Just wanted to mention I too was having this exact same issue with the same results.
Tried all the many other methods and finally I turned off my anti-virus program and that solved the problem.
I guess it was interfering with Elicense trying to register like you mentioned.
But now I have to run ootp10 with my anit-virus turned off, even with ootp10exe and runservice.exe added to the anti-virus' exclusion and allow always list.
Goodluck!